Workshop ventilation



C. WELLER.

WORKSHOP VENTILATION.

APPLICATION FILED IAII.5, IQIII.

L34?, 1 95. mentari my 1920.

2 SHEETS-SHEET l.

figg@ C WELLEHI WORKSHOP VENTILATION.

APPLICATION FILED JAI-5, 19m.

ante July 2?, E92@ 2 SHEETS-SHEET 2.

.5, I l U I n if n 1 n w UNITED STATES PATENT OFFICE.

CHARLES WELLER, OF ZURICH, SWITZERLAND.

WORKSHOP VENTILATION.

Specification of Letters Patent.

Patented July 20, 1920.

Applicationvled January 5, 1918'. Serial No. 210,519.

T0 all whom t may concern.'

Be it known that I, CHARLES WELLER, citizen of Switzerland, residing atZurich, Sndtzerland, have invented certain new and useful Improvementsin )Workshop Ventilation, of which the following is a specification.

This invention relates to cleaning shops for cleansing work by means ofa sand jet, the dust caused thereby inthe cleaning room being removed bymeans of an articially produced current of air.

The particular purpose of the invention is to create a cleaning shopprotecting laborers from being inconvenienced by dust or draft, andinsuring agreeable working. A.' further purpose of the invention is topro cure the means of admitting the air required for the removal ofdust, at a high speed,'as close as possible to the zone where dust isforming, thus a smaller quantity of air than usually is needed, andconsequently the consumption of power for operating the eX- hausterdiminishes. Besides, by the application of the invention, the greatestetliciency is obtained in cleansing all kinds of work. In order toaccomplish said purposes, there are, according to the invention, for theadmission of air adjustable channels provided for, one end communicatingwiththe open air, the other end running into the cleaning shop, so as toallow the air passing through these channels to be directed exactly ontothe spot where required.

These channels can be suitably disposed so as to revolve around avertical aXis, or, parallel to each other enabling them to be moved inlongitudinal direction. In the latter case it is advisable to bend thechannel ends projecting into the cleaning shop, toward each other so asto cause the currents of air, discharged by them, to concur at an angleof 90.

These and other features of the invention including certain details ofconstruction and combinations of parts will be described in connectionwith the accompanying drawings and pointed out in the appended claims.

Referring now to the accompanying drawings, these showl twoconstructions under the invention, partly in schematic view; i. e.

Figure 1 shows the first construction under the invention, partly inlongitudinal section partly in view,

Fig. 2 is a vertical section on line a-a of Fig. l,

Fig. 3 is a horizontal section on line -Z) of Fig. 1, showing part ofthe arrangement asseen from above,

Fig. l is part of a side elevation of the other construction,

Fig. 5 is a horizontal section through this construction on line c-c ofFig. fl.

Referring now more particularly to Figs. 1 to 3, the walls and ceilingof the cleaning shop, shown in these figures, are made of sheet iron,the shop consisting oli a cleaning room 1 and of a smaller room 2, inwhich the sand box 3 is placed, and where generally the workman also iswho attends to the plant. Room l is closed up by a double door l androom 2 by a door 5. In room 1 a track 6 is provided for so as to allowthe work to be transported `conveniently into and from the cleaningroom; the latter having also a grate floor 7 (for clearer comprehensiononly partly drawn in Fig. 3) allowingr the sand which drops from thework, and the severed parts of material to iall into a collecting pit 8provided for beneath room 1 and extending below room 2. This pit narrowstoward its bottom, on which a screw conveyer 9 is disposed for thetransport of the sand to an elevator 10 conveying said sand back to box3. Above the screw conveyerV there is a horizontal wire sieve 11 (partof which is indicated in Fig. 3) disposed in the collecting pit S toretain the coarser impurities that drop with the sand. An apparatus forthe removal of dust 12 is mounted into the return conduit leading fromelevator 10 to sand boX 3. The latter is provided, at the bottom, with amixing apparatus connected to a compressed air piping 13, thus allowingthe sand to be blown onto the work under high pressure through a conduit'14 (drawn in Fig. 3 only) connected to said mixing apparatus. In orderto remove the dust caused thereby from the room 1, a strong current ofair is produced therein. To this effect, an outlet shaft 15 is disposedon the ceiling of the cleaning shop and connected to an exhauster (notdrawn) besides, at the bottom and on the top of the wall parts 16 (Fig.3) of room 1, adjoining to room 2, two air admission openings areprovided for, into each of which a casing 17 is placed. The two casingsof each wall part 16 are connected with each other by a cylinder18-revolving around its vertical axis. Each cylinder has a longi-Atudinal slot extending almost over its entire length, a guide block 19projecting radi ally `from the cylinder being connected to.

the slot. Vhile work is cleansed, outside Aairis sucked in at a'highspeed through the air admission channels 17', 1S, 19 into room 1, thecurrent of air, thereby lproduced in this room, being aidedvby thecxhauster which is set going in the meantime. Owing to the rotation oithe cylinders 18, the guide blocks 19 can be directed with their noZ-zles straight onto theV work, thus the air ,'currents, discharged by"them, strike the Y let shaft 15 by a piping. Y

The second construction, shown in Figs.-

lot the current of air.

` work with the greatest possible iorce and at 4 and 5, dilers from thatdescribed above, chiefly by the fact that vertical slots are providedfor in the wall parts 20, intoV each of whichis fitted an air admissionchannel 22, open at either end. These `admission channels are suspendedfrom guide rails 24 by means of sheaves, and can be moved in Ytheirlongitudinal direction, c'. e. parallelrto each other, as indicated by adot andfdash line in Fig.v5. The'ends of the admission channels 22projecting into lroom 1 are bent toward each other so as tosallow thecurrents of air, discharged by them, to cross atY an angle of 90. Thecleaning room 1 can be charged in this instance from theV front side,opposite to room 2 and provided with a double door 11. i

Having described the nature of my invention, what 1 claim as new anddesireV to secure by Letters Patent of the 'United States is 1. In adevice of the character described, Y

the combination with a casing communicating with atmosphere,.an airconduit movably mounted in and communicating with said casing and havingan air emission opening/formed in and extending lengthwise of its wall,and` means immediately adjacent said opening for giving directionto airissuing through said opening. Y

2. In a device of the character described.

the combination with a'pair ooppositely Vdisposed casings communicatingwith Aatmosphere', an air conduit rotatably mounted in and its endscommunicating with said casings and havingV an airemission openingformed in and extending lengthwise of its wall, and an air directingvmember mounted adjacent said opening in the air conduit.

3. In a device of the character described,

the combination with upper and lower oppositely disposed casingsbothcommunicating with atmospherejanopen ended cylinder held in vsaidcasings and rotatable about its own axis therein, said cylinder having aslot in its; wall extending substantially throughout its length, andwings at opposite sides of said slot for giving direction to air issuingtherethrough.

In testimony whereof I have aifixed'my signature in presence of twowitnesses.

CHARLES WELLER.

Witnesses: N. B. RHUMED L. RAPHAEL GEIsLER.

